Auto resize schedule

1 files changed, 53 insertions, 10 deletions

diff --git a/src/client/react/components/presentational/Schedule.js b/src/client/react/components/presentational/Schedule.js
index 256c1b4..e62039c 100644
--- a/src/client/react/components/presentational/Schedule.js
+++ b/src/client/react/components/presentational/Schedule.js
@@ -2,18 +2,61 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import createDOMPurify from 'dompurify';
 
-const Schedule = ({ htmlStr }) => {
-  const DOMPurify = createDOMPurify(window);
+class Schedule extends React.Component {
+  constructor(props) {
+    super(props);
 
-  const cleanHTML = DOMPurify.sanitize(htmlStr, {
-    ADD_ATTR: ['rules'],
-  });
+    this.updateScaling = this.updateScaling.bind(this);
+  }
 
-  return (
-    // eslint-disable-next-line react/no-danger
-    <div dangerouslySetInnerHTML={{ __html: cleanHTML }} />
-  );
-};
+  componentDidMount() {
+    window.addEventListener('resize', this.updateScaling);
+    this.updateScaling();
+  }
+
+  componentDidUpdate() {
+    this.updateScaling();
+  }
+
+  componentWillUnmount() {
+    window.removeEventListener('resize', this.updateScaling);
+  }
+
+  updateScaling() {
+    const windowWidth = window.innerWidth;
+    const tableNode = this.scheduleDiv.querySelector('table');
+    if (!tableNode) return;
+
+    // We want a 16px margin on both sides, this marging will be scaled with
+    // the entire schedule.
+    const tableWidth = tableNode.offsetWidth + 32;
+
+    let scale = windowWidth / tableWidth;
+    if (scale > 1) {
+      scale = 1;
+    }
+
+    this.scheduleDiv.style.transform = `scale(${scale})`;
+    this.scheduleDiv.style.transformOrigin = 'left top';
+    this.scheduleDiv.style.margin = `${16 * scale}px`;
+  }
+
+  render() {
+    const DOMPurify = createDOMPurify(window);
+
+    const cleanHTML = DOMPurify.sanitize(this.props.htmlStr, {
+      ADD_ATTR: ['rules'],
+    });
+
+    return (
+      <div
+        // eslint-disable-next-line react/no-danger
+        dangerouslySetInnerHTML={{ __html: cleanHTML }}
+        ref={(div) => { this.scheduleDiv = div; }}
+      />
+    );
+  }
+}
 
 Schedule.propTypes = {
   htmlStr: PropTypes.string.isRequired,